sga | Shelley-Godwin Archive | Continuous Backup library

Suppose I have a list of Strings like this:

["aesfa","gwopq","awefg"]

I would want to get all possible combinations between those Strings, something like this:

["aga","agw","age","agf", ... ,"sga","sgw", ... , "aqf","aqg"]

The strings inside the list have all the same lenght, but could be any lenght, and the list could contain different numbers of strings

I tried the following list comprehensions:

-getCombinations (z:zs) = [x:y | x <- z, y <- zs]

This gives me, obviously, a list of the combinations between all the characters of the first string and the rest of the strings (not the characters).

-getCombinations (z:zs) = [x:y | x <- z, y <- getCombinations zs]

This doesnt work if I dont do a pattern matching for the empy list, I did it like this:

getCombinations [] = []

but doing that make the function return always the empty list no matter what

weirdly enough, if I do:

-getCombinations (z:zs) = [x:[y] | x <- z, y <- head zs]

it gives me the combinations between the first two strings

I tried to extend that to get another String and I ended up with this:

getCombinations (z:zs) = [x:[y]++[w] | x <- z, y <- (head zs), w <- (head(tail zs))]

That gave me the combinations of the first three strings

So, i'm working with 3 different datasources in my application. Initially there were 2, but i had to add another one due to some project changes. After creating a model, a repository, a class to configure this new datasource i'm not able to start my application. It gives the error below:

I am able to read in a PubMed ID of a paper, and return a set of records about that paper using this code:

I'm trying to parse tables from a website to a local dataframe.

here is the html:

I have a dataframe like this:

I am writing a program for an assignment that has the following conditions:

1. 12 bars per case, represented by bars_per_case

2. A price of 1 per bar: price_per_bar

3. A case cost of 8: cost_per_case

4. A 10% cut: SGA

The program should ask the user how many bars were sold and calculate the SGA amount and total net gain cheer_proceeds. The program should have a different message depending on cheer_proceeds: "Congratulations ..." when cheer_proceeds >= 500 or "Sorry ..." when cheer_proceeds < 500.

The program should NOT accept a negative number of bars. If a negative number is entered, the program should NOT move forward to calculate totals until valid data is entered.

My problems are:

1. When I use the while loop, the last lines the if cheer_proceeds... keeps looping
2. When entering a negative number the code still continues

Where would I insert a break in order to stop the loop?

My code:

With the code I can search for data without problem. But let´s say I know the "name" of a Virtual Machine, but don´t want to search for it manually, but don´t know it´s "uuid".. would it be possible that the code goes (loops?) through the whole json file (it´s deeply nested), finds that "name" and returns the "uuid"? Somewhat like this if "name" == "DEV Ubuntu 18": print("uuid") I know it´s not that simple, like above, but it serves only as explanation what I want to achieve.

I am calling a function in order to do a select statement in a bundled SQLite database. The function returns an array of structs. The database is being read correctly as I have put some print commands in the code. However the final array only has 1 row in it, which contains all the data, instead of 16 rows of structs.

The struct code, which is in databaseHelper.swift, is...

I'm trying to read a database and copy the rows into an array in swiftUI but I don't know the correct syntax to append the array. Here is my databaseHelper.swift